Just Be Brave?

What is life like without the guidance of the absolute truth found in God's Word? Well, here is a hint. This is how an unnamed university professor begins one of his semester courses:

There is no system of philosophy to spin out. There are no ethical truths. We are mistaken to think that anyone ever had the answers. There are no answers. Just be brave.

If all that is here said, one wonders why one should "just be brave." Why not say, "Just put a gun to your head and end it."? If there are no answers--and no possible way of finding them--why even attempt living? Such optimism in the face of such woe seems misplaced.

The real bravery comes through knowing the right philosophy and living according to the ethical truths contained in the Bible. Certianly there was no braver man in the world than Jesus Christ, who set his face like flint and bore the cross and its shame courageously.